1. Check near the front of the engine, in the area where the engine meets the frame.
2. Look for a set of stamped letters and numbers.
3. The engine number is usually engraved on the crankcase half, near the kickstart lever.
If you are still having trouble finding the engine number, you can consult your bike's owner's manual or contact a Suzuki dealer or service center. They should be able to help you locate the engine number and provide any additional information you may need.